Dirt insensitive optical paper path sensor

Details Dirt insensitive optical paper path sensor Dirt insensitive optical paper path sensor

G - Physics

01

N

314/7, 340/124.1

G01N 21/86 (2006.01) B65H 7/14 (2006.01) G03G 15/00 (2006.01)

Patent

CA 1240754

ABSTRACT The present invention is concerned with a self-adjusting document sensor compensating for degradation of the sensor system. A suitable light source and a detector are provided, the output of the detector being fed into an amplifier whose gain depends upon a feedback signal. Periodically, the output of the amplifier is compared to a reference. If the output of the amplifier falls below the reference, a pulse is sent to a ripple counter whose digital output is fed back to the amplifier to change the gain of the amplifier.If the detector is an unbiased photodiode operating in the transconductance mode, the leakage currents and their subsequent effect on output with amplifier gain changes will be minimized.

491274

Affiliated with

Also associated with

Rating

Dirt insensitive optical paper path sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dirt insensitive optical paper path sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dirt insensitive optical paper path sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1184356